changed method to local clone submodules to using git submodule foreach from the local copy

1 files changed, 4 insertions, 4 deletions

diff --git a/tools/dockerfile/interoptest/grpc_interop_ruby/build_interop.sh b/tools/dockerfile/interoptest/grpc_interop_ruby/build_interop.sh
index e5edb5335c..68aa7a1643 100755
--- a/tools/dockerfile/interoptest/grpc_interop_ruby/build_interop.sh
+++ b/tools/dockerfile/interoptest/grpc_interop_ruby/build_interop.sh
@@ -33,16 +33,16 @@ set -e
 
 mkdir -p /var/local/git
 git clone /var/local/jenkins/grpc /var/local/git/grpc
+# clone gRPC submodules, use data from locally cloned submodules where possible
+(cd /var/local/jenkins/grpc / && git submodule foreach 'cd /var/local/git/grpc \
+&& git submodule update --init --reference /var/local/jenkins/grpc/${name} \
+${name}')
 
 # copy service account keys if available
 cp -r /var/local/jenkins/service_account $HOME || true
 
 cd /var/local/git/grpc
 
-# clone gRPC submodules, use data from locally cloned submodules where possible
-git submodule | awk '{ system("git submodule update --init --reference \
-./../../jenkins/grpc/" $2 " " $2) }'
-
 rvm --default use ruby-2.1
 
 # build Ruby interop client and server